Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['655', '7701', 'D', '9249', 'm', 'b', '2603']

655, 7701, 4, 9249, 13, 2, 2603